package com.example.community.util;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;

public class CookieUtil {

    public static String getValue(HttpServletRequest request, String name) {
        if(request == null || name == null) {
            throw new IllegalArgumentException("参数为空！");
        }

        Cookie[] cookies = request.getCookies();//所有的cookie对象
        if(cookies != null){
            for(Cookie cookie:cookies)
            {
                if(cookie.getName().equals(name)){
                    return cookie.getValue();
                }
            }
        }
        return null;
    }
}
